In determining the population validity of an experiment, one needs to know the researchers'
A) experimentally accessible population.
B) target population.
C) personological characteristics of the sample that might interact with the experimental treatment.
D) all of the above.

Question

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Population validity concerns how well the results of an experiment can be generalized to the broader population. This involves understanding the target population (the entire group the researchers want to generalize their findings to), the experimentally accessible population (the subset of the target population that the researchers can realistically access), and any specific characteristics of the sample that might interact with the experimental treatment, affecting the generalizability of the findings.

In Determining the Population Validity of an Experiment, One Needs